The guadalete river basin

The Guadalete River Basin and

Estuary

F.-Javier Gracia [email protected]

Coastal and Marine Geology and Geophysics Research Group

Dept. of Earth Sciences

University of Cádiz

CÁDIZ PROVINCE

GUADALQUIVIR ESTUARY

STRAIT OF GIBRALTAR

THE ALPINE MEDITERRANEAN MOUNTAIN RANGES AND OROGENS

THE BETIC CORDILLERA

MAIN ANDALUSIAN RIVER BASINS

TOPOGRAPHY

RELIEF

MAIN PHYSIOGRAPHIC REGIONS

GEOLOGY OF CÁDIZ

MAIN AQUIFERS IN THE BASIN

THE GUADALETE RIVER BASIN

Water discharge: about 600 hm3/yr

MAIN ANNUAL PRECIPITATION

PLUVIAL EROSIVITY – SOIL EROSION

NATURAL PROTECTED AREAS

The basin head and upper valleys

Sierra de Grazalema

ZAHARA RESERVOIR

The northern mountain sector

The intermediate hills (campiña)

and the big reservoirs

ARCOS DE LA FRONTERA

THE ARCOS AND BORNOS RESERVOIRS

LOS HURONES RESERVOIR

The lower valleys and lowlands

The Guadalete estuary and the coast

Bay of Cádiz

Holocene evolution

Martínez del Pozo (2000)

Recent evolution of coastline

Recent evolution of coastline

1956 2002

Recent evolution of coastline

Salt marshes

Salt marshes

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© M

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Tidal channels

Tidal channels

Sea level trends for Cádiz city

(Tidal gauge records, 1961 – 2008)

Permanent Service for Mean Sea Level

Present Guadalete estuary at El Puerto de Santa María